On Thu, 4 May 2000, SHUDO Kazuyuki wrote:
> Juergen Kreileder wrote:
>
> > IBM has its own JVM. Our 1.3 will have Sun's HotSpot VM.
>
> Is the forthcoming Blackdown JDK 1.3 based on the
> source code of HotSpot VM available under SCSL ?
> I infer the answer is no.
My understanding from reading the status page and talking with
several people at LinuxWorld in February is that that is correct.
However, I believe Sun have said that they will make the 1.3
source available under the SCSL at some point, probably after
they get around to shipping the FCS version.
> The archive containing the sourcecode (hotspot1_0_1-src.tar.gz)
> seems to contains only SPARC stuffs.
Yes that's the original server side HotSpot VM. 1.3 includes the
so-called client side HotSpot VM, which is supposed to have better
performance with interactive applications.
> Will the HotSpot VM have a JIT compiler?
I'm pretty sure that the Classic VM included with the 1.3 release
candidates for Windows does not include a JIT. Since the default
VM is HotSpot, which has their dynamic compilation technology in
it, that won't be a problem for most people. However, if you hit
a bug in HotSpot that requires you to switch to the Classic VM,
you're screwed, as it has no JIT (unless you install one). :(
> I know Sun migrates from the classic VM to the HotSpot VM.
> One of my concerns is the effect of that migration
> on developments of JIT compilers.
>From what I've seen of IBM's 1.3, with its improvements on their
already fast 1.1.8 VM, I think you have more to fear from it in
this regard.
Scott
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Scott Murray email: [EMAIL PROTECTED]
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